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Ikeura, Hiromi*; Sekiguchi, Tetsuhiro
Photon Factory Activity Report 2013, Part B, P. 518, 2014/00
Organic electrically conducting 
-stacked small molecules are widely regarded as promising materials for future application of low-cost and flexible nanoelectronics. Pentacene is one of the most promising organic semiconductors because of its excellent device performance. Direct measurements of electronic structures of unoccupied states of organic semiconductors lead to better understanding of mechanism of electron conduction. For probing unoccupied partial density of states (DOS), X-ray absorption spectroscopy (XAS) is commonly used, where selective excitation of the 1s core electron to the unoccupied conduction band is possible. The molecular orientation of pentacene derivative has been investigated by angle dependent XAS measurements. Electronic states were calculated by DVX
method.
Imazono, Takashi
no journal, ,
The Kansai Photon Science Institute of Japan Atomic Energy Agency has an X-ray laser (XRL) system. The XRL source having a wavelength of 13.9 nm has been used for interference measurements taking advantage of the short pulse duration and coherence. In XRL applications, many types of soft X-ray optical components, especially Mo/Si multilayer mirrors, are widely used and indispensable. The optical properties had been evaluated by using a soft X-ray reflectometer at a JAEA dedicated beamline, BL-11, of the SR Center. Besides, the polarization performance of Mo/Si multilayers mirrors, which are well-known as highly efficient polarizers, had been characterized by a high-precision nine-axis soft X-ray ellipsometer installed in the most downstream of BL-11. In this annual meeting, polarization control techniques of synchrotron radiation and XRL sources with Mo/Si multilayer polarizers will be presented.